Pipe-union.



No. 652,816. 'Patented July 3, lao. M..sNYnEn.

PIPE UNIUN.

(Application led Mar. 21, 1900.1

(No Model.)

PATENT Prion.

MAX SNYDER, OF BEATTY, PENNSYLVANIA.

PIPE-UNION.

. SPECIFICATION forming part of Letters Patent' No. 652,816, dated Tuly 3, 1900. Appnmion ned Marcil 21,1900. serial No. A9.611. (No mtas To all whom, it may concern:

Be it known that I, MAX SNYDER, a citizen of the United States, residing at Beatty, in the county of Westmoreland and State of Pennsylvania, have invented a new 'and useful Pipe-Union, of which the following is a speciiication.

The joining of a pluralityV of pipe-sections in the construction of steam or other apparatus which contemplates the conveyance of a tiuid under tension necessitates the provision of means for preventing leakage at the points of connection of the pipe-sections or other iudividual members of the conduit. Ordinarily this end has been attained by connecting the contiguous pipe-sections by means of a pipe joint or union comprising two members having threaded connection with the pipe-sec? tions and urged against an interposed ring of packing by suitable adjusting mechanism, ordinarily a crownof bolts. ferred to is objectionable, because the pressure to which it must be subjected renders it speedily ineffective and necessitates frequent replacing of the packing-ring.

My invention relates, therefore, to a novel pipe-joint, and has for its object the production of a joint or union for connecting the contiguous ends of pipe-sections Without necessity for the employment of compressible packing.

To this end the invention consists in constitnting the members of the joint into male andA female closures by providing them, respectively, with an annular recess and a correlative annular projection, the eectiveness of which latter is increased by the formation upon its effective face of a pluralityof concentric contact-faces designed for effective engagement with the bottom wall of lthe an! nular recess in the opposed member or section.

In the accompanying drawings, Figure l is a diametrical sectional view through one form of my pipe-joint in effective connection with the contiguous ends of two pipe sections. Fig. 2 is a similar view of a slightly-modified form of joint, the members being out of effective engagement and the pipe-sections being removed. Fig. 3 is a view similar to Fig.

5o 2, showing a greater number of concentric bearing-surfaces forming the face of the an- The packing re-y vthe provision of a depression in the latter;

and Fig. 4 is a perspective view of the male member of the joint shown in Fig. 2.

Referring to the numerals of reference in- Idicatinrg corresponding parts in the several ;views, l and 2 indicate the contiguous ends of a pair of pipesections intended to be con- Inected or joined by my improved pipe-joint in a mannervto prevent leakage of a fluid under pressure. Each of these sections is provided with external screw-threads 3 and 4 for engagement with the internal threads 5 and 6 of the pipejoint members 7 and 8, As usual,vthe joint members are formed in cast fmetal of substantially-circular contour, and

after being screwed upon the pipe-sections are designed-to be drawn together to close the joint by means of a crown of bolts 9 piercing the members, preferably acent to their peri pheries, and provided with heads 10 and nuts 11, bearing, respectively, upon the outer faces of said members. As thus far described the joint is substantially of ordinary e construction, a ring of librous or other compressible packing being ordinarily interposed between the joint members, as heretofore suggested. In carrying out my invention I provide in the inner face of the section 7 an annular groove or depression l2, Whose bottom wall 13 is carefully trued and forms an effective bearing-surface or contact-face for .engagement with the opposed effective face 14 of a correlative annular projection 15, eX-

'tending from the opposed face of the member 8. This arrangement of interfittin g parts constitutes the members 7 and 8, female and male members, respectively, and they will be vdesignated by these terms for the purpose of succinct definition in the appended claims.

I have found in practice that the joint is rendered more effective and its life as a secure closure is prolonged by providing the eifective faces 14 of the male members With a-plurality of bearings or contact-surfaces. The reason for this is that in the event of slight marring of one of the surfaces the integrity of the others is not necessarily impaired and the effectiveness of the joint will IOO therefore be maintained in instances Where it would otherwise permit leakage of a Iiuid under tension.

In Fig. 1 of the drawings I have shown a medial annular groove or depression 16 in the effective face 1i of the annular projection, defining a plurality of annular bearing or contact faces 17 and 1S. In Fig. 2 I show two depressions, deiinin g three concentric annular bearing-surfaces located, respectively, at each edge and at the middle of the face 11, and in Fig. 3 I show a still greater number of depressions, defining four concentric annular contact-faces, the total surface area of all of which is less than the area of the intermediate depressions.

It will be observed that in practice the joint members are screwed upon contiguous sections of pipe and are drawn together with considerable force by the screwing up of the nuts 11 of the bolts 9, the approach of the members effecting the interlitting of the projections 15 with the depressions 12, causing the eieet-ive faces 13 and 14 to contact, and thereby preventing the escape of steam or other iuid from the conduit, of which the pipe-sections constitute component parts.

Vhile I have described my invention as applicable to pipe-joints, I do not desire to be understood as limiting myself to its use in that connection, as it is obvious that the formation of a fluid-tight joint could be effected in various connections in accordance with the spirit of my inventionuas, for instance, in valve, trap, or other constructions comprehending a plurality of members designed to be connected in a manner to prevent the escape of contained iiuid.

If desired, a viscous seal-as, for instance, white lead or its equivalent-may be deposited in the annular grooves or depressions 1G prior to the drawing up of the joint, but ordinarily this will be entirely unnecessary.

l. A joint comprehending two members provided, respectively, with a depression and a projection, the opposed faces of the depression and projection constituting bearingfaces, one of which is formed with a series of separated contact-surfaces and the other of which is located in the same plane throughout.

2. A packingless joint comprising two mem bers one of which is provided with a bearingsurface lying in the same plane throughout, and the other of which is formed with a bearing-surface composed of a series of separato contact-faces located in the same plane and arranged for engagement with the bearingsurface of the other member, said bearingsurfaces, when in contact, being located in a plane removed from, but parallel with, the plane of the opposed faces of the members.

3. In a joint, the combination with a female member provided with an annular depression having its entire bottom wall located in the same plane, of a male member provided with an annular projection having aseries of separated contact-surfaces opposed to the bottom wall of the depression in the other member, and means for drawing the members into effective contact.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

MAX SNYDER.

Witnesses:

J. M. STERLING, MARK BAUER. 

